Circulating-pump



C. A. GRASSWICK.

-CIRCULATING PUMP.

APPLICATION FILED AuGJ. 1918.

Patented Apr. 12, 1921.

2 SHEETS-SHEET l.

C. A. GRAS'SWICK.

CIRCULATING PUMP. APPLICATION FILED AUGJ Patented Apr. 12, 1921.

2 SHEETS-SHEET 2.

5.0 the chambers 6 and 7. The valve has ports UNITED STATES PATENT OFFICE-4v CARL A. GRASSWICK, OF MINNEA'POLIS, MINNESOTA, .ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO WOOD-CRAFT COMPANY, OF ST. PAUL. MINNESOTA,

' A CORPORATION OF SOUTH DAKOTA.

CIRCULATINGr-IPUMP.

Application filed August 7, 1918. Serial No. 248,740.

Minnesota, have invented certain new and useful Improvements in Circulating-Pumps, of which the following is a specification.

The object of my invention is to provide a circulating pump mounted in such a way' that it'can be easily and quickly swung to a position where it will permit convenient access to the engine.

A further object is to so mount the pump that its movable feature or characteristic may be utilized in maintaining the proper degree of tension on the pump belt.

A further object is to so'mount the pump with respect to the fan that each may be driven by separate belts with a proper degree of tension for both belts.

Other objects of the invention `will appear from the following detailed description.

The invention consists generally in various constructions and combinations, all as hereinafter described and particularly pointed out in the claims.

In the accompanying drawings forming part of this specification,

Figure 1 isa perspective view of'an internal combustion engine circulating pump and fan,

Fig. 2 is an end view of the same,

Fig. 3 is a sectional view on the line V3 3 of Fig. 2,

Fig. 4 is a sectional view on the line 4-4 of Fig. 3.

In the drawing, 2 represents the upper portion or head 'of the engine cylinder. 3 is a casting secured to the cylinder and having a water circulating passage 4 leading to the cylinder jacket. 5 is the pump cylinder and 6 a centrifugal or revolving piston l therein mounted in a chamber 6 and com-l municating with a chamber 7 through a port 8 provided in a wall 9 between said chambers.

The cylinder 5 has a valve casing 10 in bwhich is seated a cylindrical valve 11 having ports 12 and 13 communicating with 14 and 15 separated by a wall 16 and the ends of the valve are open and communicate respectively with the passage 4 and with a passage 17 which leads to thebottom of the radiator, indicated at 18.

The pump cylinder has a partial revolution on the valve as an axis, a packing ring 19 and spring 2O being provided at one end of the valve for closing the joint between it and the wall of the pump cylinder. The portsv in the pump and in the valve are so positioned that the pump may swing a limited distance without cutting off the passage through the valve and whenever desired, the pump belt may be removed, as will be hereinafter particularly referred to, so that the pump may be swung entirely away from its normal working position to allow convenient access to the engine. The normal flow of the circulating iiuid through the pump is indicated by the arrows, from the radiator through the passage 17 to the ports 10 and 12, the chamber 7, the port 8, the chamber 6 and port 14 tothe passage 4 and the cylinders, and thence through the pipe Patented Apr. 12, 1921. I

connection 21 with the top of the radiator,

not shown.

The valve and the valve casing are held in their proper relative position by means of a bolt 11 which passes through the end wall of the casing and is tapped into the wall 16 and may be loosened or drawn up until the joint between the casing and thev valve is watertight, but at the same time will allow the free oscillation of the pump cylinder on the valve.

The shaft of the pump piston is mounted in a bearing 22 which has a small by-pass pipe 23 communicating with the chamber 6 near the periphery of the pump, so that when the piston is revolving, a portion of the liquid with the lubricating oil contained therein will flow through the tube 23 into the bearing and be drawn back into the chamber 6 around the piston shaft. I am thus able to thoroughly lubricate the bearing i valve,

spring for increasing or decreasing the degree of compression of the spring. This spring normally resists the downward pull of the pump and its compression regulates the degree of tension of the drive belt 26o. If the belt is too loose, it may be adjusted by the movement of the wing nut 31 and if too tight, it may be slackened in a similar manner.

A belt 32 connects the pulley 24 with a pulley 33 on the shaft 34 of the radiator fan 35. This fan has a pivotal connection at 36 with a bracket 37 secured to the engine frame and an arm 38 on the frame of the fan is slidab-le on a rod 39 against the compression of the spring 40. This spring normally tends to swing the fan away from the pulley 24 and keep the belt under tension. By the adjustment of a nut 41 the tension of the spring 40 may be increased or decreased, as desired, and thereby the tension on the belt 32 regulated.

In the operation of the pump, a circulation is established through the passage 17 and one of the ports of the valve to the chamberi?, thence to the chamber 6 and the other valve port to the passage 4 and the cylinder jacket, and then back to the radiator. The yielding supports for the pump cylinder and the fan will maintain a suitable degree of tension on the belts at all times during the operation of the engine. If the belts stretch a little,y the springs will take up the slack and by regulating the degree of compression of thel springs, the operator canregulate the tension of each belt to a nicety and whenever desired, the belts may be ydisconnected and the pump cylinder swung out- Wardly away from the fan and convenient access be had to the fan and the engine.

I claim as my invention:

1. The combination, with a cylindrical valve, having a transversel partition thereinY and ports in its walls upon opposite sides of said partition having means for connection with a cylinder jacket and with a radiator,

of a pump cylinder having chambers therein and a wall between said chambers provided with a communicating port, said cylinder mounted for rotary movement on said valve and having ports in the walls of its chambers communicating respectively with the ports of said valve, and a revolving piston mounted in one of said cylinder chambers for establishing a circulation of fluid through said chambers and through said yielding means for supporting said and maintaining sion on said belt.

ump the desired degree o ten- 2. A circulating pump comprising a valve ment on said valve -and having chambersy a driving belt for said piston, and

therein and ports in the Wall of said chambers communicating with ports in said valve, a revolving piston mounted in said pump cylinder for maintaining a circulation of fluid through said valve and cylinder and said passages, a driving beltfor said piston, and means connected with said cylinder for yieldingly supporting the weig t' of said cylinder on said valve and maintaining the desiredl degree of tension on said belt.

3. VThe combination, with a valve, having means vfor connection with the cylinder jacket and with the radiator, of a pump cyl.- inder mounted for rotary movement on said valve and having a circulating chamber and a port communicating with a port in s aid valve and with said passages, a revolving piston in said pump cylinder, a driving belt therefor, said cylinder being free to oscillate on said valve tol increase or decrease the tension of said belt, and a spring mountedto normally support said pump and hold said belt under tension. v

4. A circulating pump comprising a cylindrical valve having a pipe connection at one end with a cylinder jacket, a pump cylinder having a` valve -casing to receivesaid valve and a pipe connect-ion with a radiator,

sesv

vsaid cylinder being' mounted for rotary movement on said valve and having ports 95 in its walls communicating with ports in said valves, a revolving piston in said cylinder for establishingl a circulation of fluid through Said valve and cylinder ports and said passages, a driving belt for said piston, means for supporting said cylinder against the pull of said belt thereon, and permitting said cylinder to describe a partial revolution on said valve when said belt is removed, for the purpose specified.

5. The combination, with an internal coinbustion engine circulating pump mounted to oscillate on a horizontal axis and pro-, vided with a revolving piston and pulleys mounted on the shaft of said piston, one of said pulleys having a driving belt connection with the crank shaft, of a radiator fan also mounted for oscillation on a horizontal axis and having a driving belt connection with the other pulley, and means for yieldingly resisting the oscillation of said pump and said fan under the pull of said belts thereon.

6. The combination, with' a circulating pump having means for connection with cylinder jackets and a radiator, and mounted for oscillation and'provided with a revolving-piston and pulley and driving belt therefor, of a radiator fan also mounted for oscillation and having a belt connection with the shaft of said piston and means for yieldingly supportin the weight of said pump and the pull o its drive belt thereon and for tensioning said pump and fan belts.

7. A circulating pump apparatus for innecting the shaft of said piston with said fan, a spring for normall supporting said pump and resisting the pull of its belt thereon, and a similar spring for maintaining the desired degree of tension on said fan belt.

8. The combination, with an internal combustion engine and a cooling fan and al cooling pump, both driven by said engine, one driven member being actuable by the other, of means for resiliently supporting one of said driven members and means for.

adjusting the relative position of said other driven member in relation to said resiliently supported driven member.

9. The combination, with an internal combustion engine, and a cooling fan and a cooling pump, both driven by said en ine, one driven member being actuable by t e other, of means for resiliently supporting one of said driven members and means for adjusting the relative position of said other driven member in relation to said en ine.

10. The combination, wit an internal combustion engine having a water jacket and a radiator having inlet and outlet con-y nections with saidjacket, of a pump mounted on one of said connectionsand operatively connected or driving purposes to said engine, said pump mountin being adjustable to provide adjustment 0% said driving connection, and a fan supported b said engine and operatively connected t creto for driving purposes.

l1. The combination, with Ian internal combustion engine having a water jacket.

and a radiator having inlet and outlet connections with said jacket, of a pump mounted on one of said connections and operatively connected for driving purposes to said engine, and a fan supported by said engine and operatively connected to said pump for driving purposes, said pum mounting being adjustable to provide a justment of said fan and pump driving connections.`

12'. The combination, with an internal combustion engine having a water jacket and a radiator with inlet and outlet con- 'nectionsito said jacket, of a pump' having a sleeve portion arranged on one of said connections and ported to direct the flow of water through said pump from said connections', packing glands arranged between said sleeve portion and said connection and spring means for .positioning said packing glands between said sleeve portion and said connection. j

In witness whereof, I have hereunto set my hand this v30 day'of July, 1918.

CARL A. GRASSWICK. 

